The balance beam is generally made of hardwood, mostly nanmu. Because the beam requires high hardness of wood, nanmu wood is hard, durable and corrosion-resistant, and it is also very suitable for making beams. There are many kinds of nanmu, such as nanmu, Jin Sinan nanmu and Minnan. Jin Sinan is the best nanmu. Under the sunlight, you can see the glittering gold thread on it, which is very beautiful, so it is also very expensive. Phoebe bournei is the worst kind of Phoebe bournei. Generally, some small furniture such as tables, chairs and benches will be made of nanmu.